Sifting-grate



(No Model.)

I H. H. JAMES & J. O. DUNBAR} SIPTING GRATE.

No. 256,696; Patented Apr.18,1882.

' WITNESSES:

ATTORNEYS.

N. Pains, Pmmunw wr. Wuhingim. 04 c.

nnNaY H. JAMEs AND JOHN o.

SIIFTING- PATENT OFFI E.

DUNBAR, or BANGOR, MAINE.

GRAT E.

SPECIFICATION forming part of Letters Patent No. 256,696, dated April18, 1882,

Application filed November 5, 1881, (No model.)

To all whom it-may concern Be it known that we, HENRY H. JAMES and JOHNG. DUNBAR, of Bangor, in the county of Penobscot and State of Maine,have invented a new and Improved sifting-Grate, of which the followingis a full, clear, and exact description.

The object of our invention is to provide a new and improved grate whichcan be shaken or dumped very easily and rapidly.

Reference is to he hadto the accompanying drawings, forming part of thisspecification, in which similar letters of reference indicatecorresponding parts in all the figures.

'Figurel is a planview of ourimproved grate. Fig. 2 is a longitudinalsectional elevation of the same on the line as 00, Fig. 1. Fig. 3 is across-sectional elevation of the same. Fig. 4 is alongitudinalsectionalelevation ofone of the rocking grate-bars. Fig.5 is a plan view of theslotted or apertured bar for connecting the grate-operating crank. Fig.7 is alongitudinal elevation of the same,

The grate-bars A are provided with a series of lateral projecting teethor pron gs,B, on each longitudinal side, all these prongs or teeth beingequidistant and of the same length. Each grate-bar is provided with adownwardly-pro jecting arm, 0, arranged in the middle of the bar A andparallel with the transverse prongs or teeth B. The ends of the bars Arest loosely in slight recesses a in the projections b on the upperedges of the longitudinal sides D of a frame, E, provided with the frontend pivot, F, and a rear end pivot, F,which-pivots pass into suitablebearin gs in the furnace or stove frame, so that the frame E can swingon these pivots. As the ends of the bars A rest loosely on theprojections or elevations b, the bars can be caused to swing, rock, ortilt. The ends of thedownwardly-projecting arms 0 are passed throughslots or openings G of a bar, H, passing longitudinally under the centerof 'the frame E, and a springwire, J, or equivalent, is passed into eachaperture 0 in the end of each arm 0, for the purpose of holding the barsA, the frame E, and the bar H together, the bar H resting on thesprings, wires, or equivalents, J. The bar H is provided at the frontend with a recess in its upper edge, whereby a hook, K, is formed at theend of the bar H. The front end pivot, F, of the frame E is surroundedby a sleeve, L, provided with a cam-flange or ridge, M, arrangeddiagonally to the longitudinal'axis of the sleeve L and passing into therecess of the hook K of the bar H. This cam flange or ridge M has one ormore notches, u

d, in its outer edge, for a purpose that will be set forth hereinafter.The outer end, L, of the. sleeve L is squared, so as to adapt it to fitin the squared openingN of the crank O. The outerend of the pivot F isflattened or decreased in thickness, so as to fit into a recess ornotch, P, in the grank 0.

At one side of the stove or frame (in this case'on the right side) adownwardly-projecting arm,Q, with a flange or lug, R, at the lower end,is provided, upon which flange one edge of the-frame E can rest whenthis frame is in a horizontal position.

The grate-bars'A are solocated thatthe ends of the teeth B of twodiflerent bars A will be separated a distance about equal to thedistance that the teeth of one and the same-bar.

A are separated.

If a very large gratesurfaee is desired, several grates of theabove-described construction and provided with the above devices foroperating them are united or combined.

The operation is as follows: If the grate is to be shaken so that theashes and cinders will fall down between the bars A and teeth B, thecrank O is passed upon the squared end L of the sleeve L, and is thenrotated or turned in the direction of the arrow a, Fig. 3. As thecam-flange M passes into the aperture in the hook K the bar H will bereciprocated by the rotary movement of the cam-flange or ridge M.Thereciprocatingmovementof the barH causes a vibrating movement of thelower ends of the armsO and causes a swinging or rocking movement of thebars A-'-that is, these bars are placed alternately in a differentposition and then back again to the original position, 850. The body ofthefire is thus loosened and lightened, instead of being shaken togethermore compactly, as it'is by the grates in use heretofore. The cinders,ashes, &e., can easily pass down between the adjoining gratebars A andtheir teeth B. If the grate is to be dumped,

the crank O is turned in the inverse direction of the arrow (1/, therebycausing the edge formed by one of the notches d to catch on the edge ofthe hook K, against which it presses, thereby tilting or dumping theframe E and the grate-bars resting thereon in the inverse direction ofthe arrow a.

The frame E, the bars A, and the bar H are united, as described, and ifthe bit} H is turned the pivoted frame E must turn with it. It is clearthat if the sleeve L is turned and the edge formed by one of its notchesd catches on the hook K the bar H, of which the hook K is a part, willturn with this sleeve Lthat is, the grate is tilted or dumped. The grateis replaced into its original position by passing the outer flattenedend of the pivot F into the notch or recess P of the crank O, and thenturning the crank in the direction of the arrow a. The grate may also bedumped by passing the flattened end of the pivot F into the recess P andturning the crank in the inverse direction of the arrow a.

If any of the grate-bars are injured by fire or otherwise, they can heremoved without disturbing or removing other parts. This grate is to beused in stoves, ranges, furnaces, boilerfurnaces, dte.

Having thus described our invention, we claim as new, and desire tosecure by Letters Patent-'- 1. The combination of the frame E, havinglongitudinal bars D, with recessed projections a I), and the end pivots,F F, arrangedin bear ings of the stove or furnace frame, the bar H,having slots G, and the rocking bars B, having arms 0, with spring-wireJ, arranged in aperture 0, whereby said frame and bars are held asdescribed.

2. In a grate, the combination, with the frame E,provided with pivotsFF,oftherocking grate-bars A, the arms 0, the bar H, the

hook K, the sleeve L, surrounding the pivot F, and the cam-flange M onthe sleeve L, substantially as herein shown and described, and for thepurpose set forth.

3. In a grate, the combination, with the frame E, provided with pivotsI" F, of the rocking grate-bars A, the bar H, the hook K, the sleeve L,the cam-flange M, and the arm Q, substantially as herein shown anddescribed, and for the purpose set forth.

4. In a grate, the combination, with the frame E, provided with pivots FF, of the swinging grate bars A, the arms 0, the rod H, the hook K,sleeve L, and the cam-flange M, provided with one or more notches, d,substantially as herein shown and described, and for the purpose setforth.

5. The combination, with the bar H, having end hook, K, and the frame E,having the flattened end pivot, 1 of the sleeve L, having diagonalcam-flange M and square end L, and the crank 0, having the squareopening N and notch P, as and for the purpose specified.

6. In a grate, the sleeve L, constructed, as shown and described, withasquared outer end, and provided with a cam-flange, M, diagonal to thelongitudinal axis of the sleeve, as set forth.

7. A grate made substantially as shown and described, and consisting ofa series of rockin g grate-bars restin gon a pivoted t'ramenvhich hasone of its pivots surrounded by a sleeve which is provided with acam-flange or ridge passing into the opening of a hook at the end of aslotted bar, uniting the downwardlyqn'ojecting arms of the rockinggrate-bars, all as set forth.

HENRY H. JAMES. J. O. DUNBAR. Witnesses:

JOHN T. BOWEN, J EWET N. BOYNTON.

